<template>
  <div>
    <p>他们一共{{crr}}岁</p>
  </div>
</template>

<script>
export default {
  data () {
    return {
      arr : [{
    name: "小明",
    age: 18
    }, {
    name: "小花",
    age: 25
    }, {
    name: "小爱",
    age: 21
    }],
    app:0
    }
  },
  computed:{
  crr(){
return this.arr.reduce((accu,item)=>accu+item.age,0)
}
  }
  }

</script>

<style>

</style>
